21351753
Beschreibung
Karteikarten von Abdullah Ahmed, aktualisiert more than 1 year ago
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Erstellt von Abdullah Ahmed
vor mehr als 4 Jahre
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| Frage | Antworten |
| Why is energy stored in lipids rather than sugars? | Lipids are more reduced |
| Difference between saturated and unsaturated fatty acids? | Unsaturated have a (cis) double bond |
| Ester linkage | -OH replaced by -OR (e.g. triglyceride) |
| Waxes | Long fatty acid + long fatty alcohol |
| What kind of reaction creates ester linkage? |
Condensation
Image:
Image4 (image/jpeg)
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| Triglyceride (or triacylglycerol) | Glycerol + 3 fatty acids |
| Micelle | Sphere of fatty acids where hydrophilic "head groups" are exposed to water |
| Glycerophospholipid (Phosphoglyceride) | Glycerol + 1. Saturated fatty acid 2. Unsaturated fatty acid 3. Phosphate + X |
| What are triglycerides used for? | Energy storage |
| 14-C fatty acid? | Myristic acid |
| 16-C fatty acid? | Palmitic acid |
| 18-C fatty acid? | Stearic acid |
| Glyceroglycolipids | Glycerol + 1. Unsaturated 2. Unsaturated 3. Sugar residue |
| Ether lipids | Glycerol + Ether-linked carbon chain |
| Ether vs ester? | |
| Increasing temperature _?_ the ratio of unsaturated to saturated fat | Decreases. High temperature increases membrane fluidity. To compensate, the concentration of saturated fatty acids, which can pack together more tightly due to the absence of double bound, increases |
| Example of facilitated transport? | Glucose transport into erythrocytes. Amphipathic helices provide hydrophilic transmembrane channel. |
| Primary vs secondary active transport? | Primary: ATP hydrolysis directly drives transport Secondary: electrochemical gradient of different molecule used as energy source (indirect use of ATP) |
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